As an expert sommelier and brewer, I can provide you with some insights on the topic of shot sizes. It's important to note that the definition of a shot can vary depending on the region or establishment. In Utah, for example, a shot is officially defined as 1.5 US fluid ounces (44.4 ml). This means that in Utah, a shot is a specific measurement.
However, in most other parts of the United States, the standard size for a shot is generally considered to be between 1.25 to 1.5 US fluid ounces (37 to 44 ml). This range is commonly accepted and used in the majority of bars and restaurants across the country. So, if you were to order a standard shot in the U.S., it would typically fall within this size range.
Now, if we consider a double shot, which is often used for certain cocktails or to provide a stronger drink, the size can vary even more. In the U.S., a double shot may be around 2 US fluid ounces (59.1 ml) or even more. However, it's worth mentioning that the size of a double shot can also differ depending on the establishment or the preferences of the bartender.
It's interesting to explore the history and evolution of shot sizes. The concept of a shot can be traced back to the early 19th century when bartenders used jiggers, small measuring devices, to pour specific amounts of alcohol into drinks. These jiggers typically had a standard size, which eventually led to the establishment of a standard shot size.
In my personal experience, I have encountered different shot sizes in various countries and establishments. For example, in some European countries, a shot may be smaller than the standard U.S. size, typically around 1 ounce (30 ml). On the other hand, in some countries, especially those with a rich tradition in spirits such as Russia or Poland, shots may be larger, often exceeding the standard U.S. size.
To summarize, the number of shots in 2 ounces can vary depending on the size of a shot in a particular region or establishment. In the U.S., a standard shot is typically 1.25 to 1.5 US fluid ounces, so 2 ounces would be equivalent to approximately 1.33 to 1.6 shots. However, it's important to keep in mind that shot sizes can differ, so it's always best to clarify with the bartender or establishment if you're unsure of the specific measurements they use.